U.S., Aug. 30 -- ClinicalTrials.gov registry received information related to the study (NCT07147998) titled 'Impact of 2D:4D Ratio on Oral Hygiene and Gingival Health' on Aug. 08.
Brief Summary: The second-to-fourth digit ratio (2D:4D)-the ratio of the length of the index finger to that of the ring finger-has gained increasing attention as a non-invasive, stable biomarker of prenatal sex hormone exposure. The 2D:4D ratio is believed to reflect the balance of prenatal androgens (especially testosterone) and estrogens. Lower ratios (more masculinized) indicate higher prenatal testosterone exposure, whereas higher ratios (more feminized) are associated with lower testosterone and higher estrogen levels. Research has linked variations in 2D:4D...